BoilerFaultCodes neon flashing (Pump runs) High
Boiler Fault Code neon flashing (Pump runs)
Also written as NEONFLASHINGPUMPRUNS — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code neon flashing (Pump runs) appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that water is not circulating properly through the system even though the pump is trying to run. (As reported on Baxi Combi 80e)
Pick your boiler brand for the neon flashing (Pump runs) fix
Source
Information for the neon flashing (Pump runs) fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026